Caballeros Radiantes
The Knights Radiant were an organization of Surgebinding warriors on Roshar.
The home of the Radiants was the country of Alethela, and the orders were centered in Urithiru.
Orders and Powers
The Radiants were divided into ten different orders, each of which somehow corresponds with one of the Heralds. Each Order had two powers associated with it, and each power was used by two different Orders. According to Teft among these Powers were the Ability to fly, walk on walls, make stone melt by looking at it, move great distances in a single heartbeat, command the sunlight, and more. The Knights Radiant used Shardblades and Shardplate, which were etched with glyphs and glowed a different color according to the Order they were a part of. Each Radiant was bonded to a spren, and that spren determines the powers and order the Radiant belongs to.
Orders included the Order of Stonewards, the Order of Windrunners, and possibly Dustbringers. The Knights Radiant used a system of powers known as Surgebinding.
Windrunners
The Windrunners were an order of Radiants who used two primary types of Surgebinding, gravity and atmospheric pressure. The combination of these two Surges resulted in three seperate powers which were known as the Three Lashings. The glow of their Shardplate was blue.
Soulcasters
Soulcasters were both a type of fabrial and a Radiant power. The fabrials were based off of and named after the Radiants who used this power. The ability was derived from using stormlight trapped in gemstones to transform one thing into one of the Ten Essences, depending on what gemstone was used.
Dustbringers
The Dustbringers could apparently burn things, mostly combustible items, though occasionally rock.
Stoneward
The glow of their Shardplate was amber. With the combination of topaz and heliodor fixed in metal, one could regrow flesh and bone. The combination was called a Regrowth; however, this may be a kind of fabrial and not a power of the order.
The Immortal Words
Main Article: Immortal Words
The Immortal Words of the Knights Radiant are a set of ideals that each Radiant follows. Each Order has five Ideals that are different form the other orders' Ideals. However, the First Ideal for each order is the same.
“Life before death. Strength before weakness. Journey before destination.”
—The First Ideal of the Knights Radiant
The First Ideal is the only Ideal shared by all Orders of Radiants. Each Order has four unique additional Ideals.
Vorinism
In Vorinism, the fall of the Knights Radiant was called the Recreance.
Vorinism taught that the Radiants betrayed the people. It was taught that their powers were not real, but elaborate tricks, and that they only pretended to have a holy calling. The "evidence" for this was that the powers could not be reproduced.